pc_count_tracker_manager.cc

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#include "cpu/probes/pc_count_tracker_manager.hh"
 
namespace gem5
{
 
PcCountTrackerManager::PcCountTrackerManager(
    const PcCountTrackerManagerParams &p)
    : SimObject(p)
{
    currentPair = PcCountPair(0,0);
    ifListNotEmpty = true;
 
    for (int i = 0 ; i < p.targets.size() ; i++) {
        // initialize the counter for the inputted PC Count pair
        // unordered_map does not allow duplicate, so counter won't
        // have duplicates
        counter.insert(std::make_pair(p.targets[i].getPC(),0));
        // store all the PC Count pair into the targetPair set
        targetPair.insert(p.targets[i]);
    }
    DPRINTF(PcCountTracker,
            "total %i PCs in counter\n", counter.size());
    DPRINTF(PcCountTracker,
            "all targets: \n%s", printAllTargets());
}
 
void
PcCountTrackerManager::checkCount(Addr pc)
{
 
    if(ifListNotEmpty) {
        uint64_t count = ++counter.find(pc)->second;
        // increment the counter of the encountered PC address by 1
 
        currentPair = PcCountPair(pc,count);
        // update the current PC Count pair
        if(targetPair.find(currentPair) != targetPair.end()) {
            // if the current PC Count pair is one of the target pairs
            DPRINTF(PcCountTracker,
                "pc:%s encountered\n", currentPair.to_string());
 
            exitSimLoopNow("simpoint starting point found");
            // raise the SIMPOINT_BEGIN exit event
 
            targetPair.erase(currentPair);
            // erase the encountered PC Count pair from the target pairs
            DPRINTF(PcCountTracker,
                "There are %i targets remained\n", targetPair.size());
        }
 
        if(targetPair.empty()) {
            // if all target PC Count pairs are encountered
            DPRINTF(PcCountTracker,
                    "all targets are encountered.\n");
            ifListNotEmpty = false;
        }
    }
}
 
}